The movie's only been out a few days, but a ton of The Winter Soldier's concept art has hit the internet from both ILM and the amazing Tim Flattery. Check out the inside of a helicarrier, the underbelly of SHIELD, and much more!
First up are some of ILM's concept art and progressions; there's plenty more over at Animation World Network.
Here's where Tim Flattery's concept art designs begin. Check out a few more over at FilmSketchr.